Week 12:Project 2-Meshing of Rear Wheel Holder challenge

AIM: Perform pre-processing, for Rear wheel holder by eliminating geometrical error, using hypermesh preprocessing software.

OBJECTIVE:

• Generate mid surface manually and perform geometry clean-up on the component.
• Generate mesh with proper mesh flow, with target element size 5 unit.
• Check the quality of the element according to the given quality criteria.

S.N	Quality Criteria	Value
1	Aspect Ratio	5
2	Skewness	45
3	Warping	15
4	Taper	0.5
5	Min. Length	2 Units
6	Max. Length	8 Units
7	Min angle Quad	45
8	Max angle Quad	135
9	Min angle Tria	20
10	Max angle Tria	120
10	Tria %	10

THEORY:

Rear wheel holder is usually sheet metal component and usually assembled at rear boot of car area. Whose function is to keep a spare wheel of a car  Hence it should be durable with high strength and toughness with good impact resistance

PROCEDURE:

• Firstly need to import a .stp file of side door.

Import > Import geometry > File type (Step) > select file > Import.

• After import of the model, change the geometry color mode to by TOPO, so that construction line are visible properly.

• Now, we need to check the construction line properly, like remove free edges, check surface deformation and rework on that, remove fillets for proper mesh flow.

• After performing geometry clean-up, now mid-surface has to be created. Before that new component has to be created.

Geom > surface edit > offset > select surface > give offset value (half of the thickness) > check vector normal > offset.

• Check again mid surface like construction line and surface deformation.
• Tools used in improving mid-surface.
• Trim with surface/ plane
• Extend
• Surface (Ruled)
• Delete surface
• Split surface
• Replace point
• Toggle edge

• Now we need to create a mesh.

2D > automesh > element size 4 > select surface > mesh.

• After creating a mesh, mesh quality has to check, and need to improve the mesh quality.

• At last, need to provide thickness.

Firstly create a property and provide thickness and then assign it to the component.